/*
* Copyright (c) Microsoft Corporation. All rights reserved.
* Copyright (c) 2023 Huawei Device Co., Ltd.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*     http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* This file has been modified by Huawei to verify type inference by adding verification statements.
*/

// === tests/cases/compiler/instantiateContextuallyTypedGenericThis.ts ===
declare function AssertType(value:any, type:string):void;
interface JQuery {
    each<T>(
        collection: T[], callback: (this: T, dit: T) => T
    ): T[];
}

let $: JQuery;
AssertType($, "JQuery");

let lines: string[];
AssertType(lines, "string[]");

$.each(lines, function(dit) {
AssertType($.each, "<T>(T[], (T, T) => T) => T[]");
AssertType(lines, "string[]");
AssertType(function(dit) {    return dit.charAt(0) + this.charAt(1);}, "(string, string) => string");
AssertType(dit, "string");
AssertType($.each(lines, function(dit) {    return dit.charAt(0) + this.charAt(1);}), "string[]");

AssertType(dit.charAt(0) + this.charAt(1), "string");
AssertType(dit.charAt(0), "string");
AssertType(dit.charAt, "(number) => string");
AssertType(0, "int");
AssertType(this.charAt(1), "string");
AssertType(this.charAt, "(number) => string");
AssertType(this, "string");
AssertType(1, "int");
    return dit.charAt(0) + this.charAt(1);

});


